arm64: dts: ti: verdin-am62: Set VDD CORE minimum voltage to 0.75V

Set VDD_CORE minimum voltage to 0.75V, TI AM62 can run at either 0.75V
or 0.85V depending on the actual speed grade and on the maximum
configured speed (1.4GHz frequency requires 0.85V).

The actual value is programmed into the PMIC EEPROM during manufacturing
(according to the SOC speed grade) and this ensure that both the voltage
values are valid and therefore the OS will not overwrite the value
programmed into the PMIC.

Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://lore.kernel.org/r/20240213155622.18309-1-francesco@dolcini.it
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
index 7e9bdba438b1c7383c788f1dd5e460bfed8fc570..bf82830caa8ae4d39145b17d69ba76e63107c1a6 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
@@ -1146,7 +1146,7 @@
                                regulator-always-on;
                                regulator-boot-on;
                                regulator-max-microvolt = <850000>;
-                               regulator-min-microvolt = <850000>;
+                               regulator-min-microvolt = <750000>;
                                regulator-name = "+VDD_CORE (PMIC BUCK1)";
                        };